Agilent Technologies HP 8566B Especificaciones descargar pdf (Pagina 207)

4. Final Display Adjustments (SN 3004A and Above)

Note

10.

11.

AlA2R517 ASTIG

AlA2R513 3D

AlA2R409

FOCUS COMP

Press

(o--2.5),

(REFERENCE LEVEL] and then adjust the reference

level to bring the displayed noise to the top division of the

graticule

((REFERENCE-LEVEL]).

Press

(ENTER~~B/DIV)

and key in 1

dB/DIV. The noise should now completely fill

the

CRT graticule

pattern, illuminating a large rectangular area. If necessary, adjust

the reference level until the graticule pattern is completely filled.

Press SWEEP

CslNGLE),

[SHIFT) DISPLAY LINE

and then

@i!iKj THRESHOLD

(OFFS

to turn off the CRT annotation and

graticule pattern.

Connect a 56503 photometer probe to the Tektronix J-16 digital

photometer. Set the photometer to the Xl range.

Place the photometer light probe hood against the IF-Display

Section glass

RF1

filter, and adjust AlA2R319 INT GAIN for a

photometer reading of 80 NITS

(cd/m2).

This reading must be made with the glass

RF1

filter in place in front of

the CRT. It might be necessary to slightly trim the top and bottom of

the photometer probe’s hood so that it will fit flush against the glass

RF1

filter.

If a standard J-16 photometer is used (instead of metric option

02),

adjust

AlA2R319

for a photometer reading of 23.5 fl (foot-lamberts).

12. Set the spectrum analyzer LINE switch to STANDBY and then

back to ON. The spectrum analyzer power-up annotation should

be visible on the CRT display. (This includes the firmware

datecode.)

13. For the best focus near the center of the CRT display, adjust the

following potentiometers in the sequence listed below. Repeat as

needed to optimize center-screen focus.

AlA3R14

FOCUS LIMIT

AlA2R517 ASTIG

AlA2R513

3D for best focus of annotation (short vectors)

AlA2R409 FOCUS COMP for best focus of graticule lines (long

vectors)

14. Adjust

AlA2R426

T/B

FOC for best focus at the top and bottom of

the display.

15. Adjust

AlA2R437

R/L FOC for best focus at the right and left

sides of the display.

16. If the top and bottom (or right and left sides) of the display

achieve best focus at different potentiometer settings, adjust

AlA2R427 T/B CTR or AlA2R440 R/L CTR, and then readjust

AlA2R426 T/B FOC or AlA2R437

R/L

FOC to optimize overall

focus.

Adjustments 3-67

1 2 ... 202 203 204 205 206 207 208 209 210 211 212 ... 404 405

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